Post on 22-Feb-2016
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[ Rhythm Reloaded ]Team 6 CEAC Presentation
Team 6 Reintroduction
Andy Gabler
Ben Moes
Nathan Brinks
David van Geest
Outline
I. Project IntroductionII. Design NormsIII. Market ResearchIV. Major DecisionsV. ProgressVI. ChallengesVII. ConclusionsVIII. Questions
Project Introduction
• A wireless electronic stethoscope that will:• Aid in auscultation• Record digital audio data from the patient• Perform frequency filtering• Store the audio files on the device• Transfer the audio files to a computer via USB• Contain these features in a convenient media-player
like form-factor
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Technical Block Diagram
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Design Norms
• Transparency: must be easy to use, no technical experience required
• Stewardship: must protect the user, patient, and environment. HIPAA, Latex Free, RoHS
• Integrity: must provide an accurate representation of the sounds produced by the body
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Market Research
Mechanical Stethoscopes• Chest Piece: Metal
Casing with Diaphragm• Ear Piece: hollow
tubing with springElectrical Stethoscopes• Preserve look• Bulky and Heavy• IR data Transfer
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Medical Community Survey
• 30 participants: 21 nurses (70%), 2 doctors (7%), 6 students (20%), and 1 Nurse Practitioner (3%)
• Overall favorable response
NurseDoctorStudentNP
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Medical Community Survey
• 78% would use the device if it was purchased for them by their employer
• 18% Yes, 46% Unsure, 36% No, if payment required
YesNo
YesNoUnsure
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Medical Community Survey
• Average price: $150• 47% report hearing difficulties• 20% report uncomfortable earpieces
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Microprocessor Decision
• Main Criteria:• USB Device functionality• DSP Functionality (Hardware Multiply)• Power consumption• Clock Speed• RoHS compliance
• Minor Considerations• Available memory, removable media interface,
GPIO, ADC, price, dev kitReintroduction
Design Norms
Surveys
μProcessor
OS
Challenges
Progress
Resource
s
Feasibilit
y
Microprocessor Decision
• First choice: Freescale Coldfire MCF5251• Development Problems:• No Ethernet on dev board• File transfer rate over serial• Memory image conversion from binary to SREC
• Second Choice: Freescale Coldfire MCF5275• Onboard Ethernet• Full OS support
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
OS Decision
• Main Criteria:• Hardware Support• Open-Source Code• User Community• Documentation• Code Footprint• Familiarity to team• Price• Multi-tasking
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
OS Decision Matrix
Weight uCLinux No OS FreeRTOS eCos GNU/Linux Nucleus RTOS uC/OS-II5 10 10 10 10 10 5 78 10 10 10 10 10 4 108 7 5 3 3 5 3 37 6 10 9 9 7 10 99 10 10 10 10 10 10 10
10 10 9 3 2 2 10 77 9 1 5 3 2 5 68 9 3 6 8 5 7 74 7 10 7 7 5 10 103 2 10 10 10 1 10 105 10 3 5 5 6 10 56 9 3 10 10 7 8 10
Total: 691 554 563 555 478 600 615
Royalties
CriterionInitial Cost
Open SourceFamiliarity
OS Size
Multi-tasking
Hardware SupportUser CommunityDocumentation
SecurityReal-Time
IDE Availibil ity
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Wireless Decision
• Pros of Wireless:• No Wires!• Simpler for User• Professional
• Cons of Wireless:• Separate Power Supply• Fidelity• Cost
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Wireless Decision
• Considerations• Wireless Options• Range• Reliability• Not too much more work• Development Time
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Wireless Decision
• Choice: F2M03MLA:• Benefits:
• Made for Streaming 16bit Audio• Small Efficient Package• Full FCC Qualification• Built in Firmware
• Deterrents:• Cost
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Progress
• uClinux running on development board out of flash• U-Boot bootloader development is complete• LCD driver complete• I2C driver complete• QSPI driver complete• FIR filters progressing• Two daughterboards designed and received• Chestpiece microphone selected• Chestpiece casing machined
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Progress
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Progress
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Progress
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Challenges
• Atmospheric• Open source software != functional• Misleading Bluetooth product documentation• Meshing assembly with C• Prototyping• Intellectual Property Discussion• Learning to write Linux software
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Conclusion
• Team has made progress on many aspects• Project is technically feasible• Time constraints will limit scope of success
Introduction
Design
Norms
Market
Research
Major Decisions
Progress
Challenges
Conclusion
Questions?